# Exploring the exterior angle theorem

- Author:
- Meghan

## Explore the Exterior Angle Theorem

Construct Triangle with ABC, with exterior angle BCD.
Find all measures of the triangle.
Find how the exterior angle BCD compares to the angles within the triangle.

## Exploring the Exterior Angle Theorem

Triangle ABC with an exterior angle BCD, find all measures of the triangle.
Compare the interior angles to the exterior angles.

## Exploring the Exterior Angle Theorem

How is the exterior angle related to the interior angles of the triangle? Describe the relationship between the exterior angle BCD and the interior angle ABC.